[FOSS_TLK][lib][service] Add ta event callbacks

Secure TA's can register to be scheduled on global ta events.

Supply an event_mask to only be scheduled on selected events.

Change-Id: I2e850405f0417d7d8492bc73cf2b30a581d9aa39
Reviewed-on: http://git-master/r/715763
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Varun Wadekar <vwadekar@nvidia.com>
Tested-by: Varun Wadekar <vwadekar@nvidia.com>
3 files changed
tree: b7b71e520c9fae5a92ac2380ceaf5fe8a3c86757
  1. client/
  2. common/
  3. ext_nv/
  4. external/
  5. include/
  6. service/
  7. task_linker_script.ld